Knife



FIG. 1 is a front elevation view of the design of the present invention for a knife, the rear elevation being a mirror image thereof;

FIG. 2 is a left side elevation view of the knife of FIG. 1, the right side elevation being a mirror image thereof;

FIG. 3 is a top end view of the knife of FIG. 1; and,

FIG. 4 is a bottom end view of the knife of FIG. 1.

The features of the knife shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

I claim the ornamental design for a knife, as shown and described. 